Collaborative: Phylogeny, Character Evolution, and Diversification of Extant Ferns

合作：现存蕨类植物的系统发育、性状进化和多样化

• 批准号: 9616260
• 负责人: Alan Smith
• 金额: $ 2.56万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1997
• 资助国家: 美国
• 起止时间: 1997-03-15 至 2002-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9616260&HistoricalAwards=false
• 关键词: Collaborative; Phylogeny; Character; Evolution; Diversification

9616260 Smith In a three-institution collaboration with colleagues at Utah State University and Chicago's Field Museum of Natural History, Dr. Alan Smith at University of California at Berkeley is amassing a major database of molecular and morphological characters of representatives of the 30 or so families of living ferns, in order to construct an overall phylogenetic framework for ferns. Building upon the impressive results of a 1994 symposium of fern specialists, with an international team that produced preliminary results for this effort (published in 1995), Smith and his colleagues are continuing a major DNA sequencing project for four genes, two from the chloroplast genome and two from the nucleus, that hold promise of yielding informative variation for genealogical analyses. This molecular database in turn is to be supplemented with traditional anatomical and morphological features drawn from the vegetative and reproductive parts of the same ferns analyzed for their DNA, features used standardly in their taxonomic identification and classification. A well-resolved phylogeny for ferns will facilitate future work on the patterns and sequences of character evolution that gave rise to the Cretaceous radiation and diversification of the major group of ferns, the "polypodiaceous" group, and will provide a foundation for family- and genus-level taxonomic revisionary research. Using comparative methods, researchers can explore patterns of association among characters for correlated evolutionary changes, that may help explain the success or failure (extinction) of various lineages within the ferns.

小行星9616260 加州大学柏克莱分校的艾伦.史密斯博士与犹他州州立大学和芝加哥菲尔德自然历史博物馆的同事们合作，正在收集一个主要的数据库，其中包括大约30个现存蕨类植物家族的分子和形态特征，以便构建蕨类植物的整体系统发育框架。在1994年蕨类植物专家研讨会的令人印象深刻的结果的基础上，史密斯和他的同事们与一个国际小组一起为这项工作产生了初步结果（1995年发表），史密斯和他的同事们正在继续进行一项主要的DNA测序计划，其中两个来自叶绿体基因组，两个来自细胞核，这有望为系谱分析提供信息变异。这个分子数据库反过来又补充了传统的解剖和形态特征，这些特征来自于对同一蕨类植物的DNA进行分析的营养和生殖部分，这些特征在其分类鉴定和分类中是标准的。 一个很好的解决蕨类植物的基因组学将有利于未来的工作模式和序列的字符进化，引起了白垩纪的辐射和多样化的蕨类植物的主要群体，“水龙骨科”组，并将提供一个家庭和属级的分类修订研究的基础。使用比较方法，研究人员可以探索相关进化变化的特征之间的关联模式，这可能有助于解释蕨类植物中各种谱系的成功或失败（灭绝）。